class AddColumnDownfile < ActiveRecord::Migration
  def self.up
  add_column :downfiles ,:size ,:integer
  add_column :downfiles ,:width ,:integer
  add_column :downfiles ,:height ,:integer
  end

  def self.down
  remove_column :downfiles , :size
  remove_column :downfiles , :width
  remove_column :downfiles , :height
  end
end
